Monitoring of eye movements resulting from the tracking of sound displacements in total darkness confirmed the generally accepted idea that smooth pursuit cannot be induced in the absence of a real visible target Exclusively saccadic movements were obtained with real and apparent displacements of a constant frequency source and with frequency variations associated to spatially calibrated positions through training for 5 Ss. Smooth pursuit eye movements were only observed if S was allowed to point and follow with his hand the perceived position of acoustic targets.
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